Compositions stabilized with N-hydroxyiminodiacetic and dipropionic acids and esters thereof
AssigneeCiba-Geigy Corporation
InventorsRamanathan Ravichandran, Thomas E. Snead
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Abstract
N-hydroxyiminodiacetic and dipropionic acids and esters thereof corresponding to the formula ##STR1## are effective in stabilizing various organic materials against oxidative, thermal and actinic degradation, said derivatives being particularly effective as color improvers and process stabilizers in synthetic polymers containing phenolic antioxidants and/or metal salts of fatty acids and as stabilizers in lubricants.
Claims13
A composition of matter comprising a polymer, resin, mineral fluid or synthetic fluid subject to oxidative, thermal and actinic degradation stabilized with an effective stabilizing amount of a compound of the formula ##STR3## wherein R.sub.1 and R.sub.2 are independently hydrogen, alkyl of 4,8 or 14 to 36 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenyl, phenyl substituted by alkyl of 1 to 12 carbon atoms, aralkyl of 7 to 9 atoms or said aralkyl substituted by alkyl of 1 to 12 carbon atoms;
- and n is 1 or 2.
Dependencies are inferred from the claim text.